Question

F(x) = -4x2 + 6x
-
4
Find f(5)

Answer 1

f(5) = -74

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

1. Brackets
2. Parenthesis
3. Exponents
4. Multiplication
5. Division
6. Addition
7. Subtraction

• Left to Right

Algebra I

• Function Notation

Explanation:

Step 1: Define

f(x) = -4x² + 6x - 4

f(5) is x = 5

Step 2: Evaluate

1. Substitute: f(5) = -4(5)² + 6(5) - 4
2. Exponents: f(5) = -4(25) + 6(5) - 4
3. Multiply: f(5) = -100 + 30 - 4
4. Add: f(5) = -70 - 4
5. Subtract: f(5) = -74